Traversing roll



Oct. 10, 1967 SHINGO HAGIHARA ETAL 3,346,204

TRAVERSING ROLL I Filed Nov. 2, 1964 2 Sheets-Sheet 1 A B l INVENTOR BY 25;! @JZ ATTORNEY Oct. 10, 1967 SHINGO HAGIHARA ETAL 3,346,204

TRAVERSING ROLL Filed Nov. 2, 1964 2 Sheets-Sheet 2 1 NVENTORS United States Patent 3,346,204 TRAVERSING ROLL Shingo Hagihara, Yasntake Kobayashi, Katsumi Hasegawa, and Shinzo Osurni, Ohtsu-shi, Japan, assignors to Toyo Rayon Kabushiki Kaisha, Tokyo, Japan Filed Nov. 2, 1964, Ser. No. 408,424 Claims priority, application Japan, Nov. 8, 1963, 38/59,565 4 Claims. (Cl. 242-43.2)

This invention relates to a drum type traversing roll, and in particular to such a roll in which the traversing width in winding a package built up with a thread or yarn is increased without increasing the diameter of the roll.

In other words, the invention makes it possible to increase the traversing width to two or more times that of the conventional drum type traversing roll having the same diameter.

The grooved roll has been used most widely to date for the cheese and cone winders in the winding operation, the use of the split drum being rare.

The grooved roll has a groove machined in the surface of the cylindrical body or is fabricated into a grooved traversing roll by assembling separate parts.

In a grooved traversing roll made in this manner, the yarn groove always has walls. The yarn introduced into the groove runs fixedly along only the bottom of the groove, and the wear of the points abraded by the yarn is excessive.

When a grooved traversing roll has been abraded, since from the standpoint of its construction it is difficult to restore it, it is inevitably used even though the rolls are somewhat marred, with the consequence that the quality of the yarn is impaired.

In addition, the intersecting portion of the groove in a grooved traversing roll is of such a construction that one of the grooves emerges to the surface of the roll and after crossing over the other groove again forms a groove, i.e., it is a noncontinuous groove. Hence, when the traversing movement is effected at high speeds, the yarn slides over the surface of the roll to render diflicult the operation of traversing in a proper manner.

For improving on the former of these defects, i.e., that due to abrasion, Gilbert US. Patent 2,801,808discloses a drum-type traversing roll. This roll comprises an outer shell and an inner shell, an endless helical slot formed in the shell surface by means of the outer shell, two reversal sections provided in the slot, and a plurality of periodically spaced pins disposed at the outermost surface of the inner shell so as to form a bottom, the yarn being wound onto a bobbin by being reeled between the aforesaid two reversals.

In the hereinabove described traversing roll, when the pins become abraded, a normal guide surface can be obtained by suitably rotating the pins or merely exchanging the pins for new ones. Thus, the repair of the roll is ac* complished very easily. Further, in view of the fact that the portions against which the yarn rubs is less, the-chances of impairing the yarn surface is minimized.

In addition, as the slot in the drum type traversing roll is provided continuously about the whole of the periphery, the yarn does not slip out from the yarn slot even for a moment. Accordingly, there is stability in the traversing of the yam even when the traversing operation is carried out at high speeds.

Thus, as hereinabove noted, the drum type traversing roll has, as compared with the grooved traversing roll, the merits that the frictional portion for guiding the yarn is less and that it is stable even when effecting high speed traversing operations. On the other hand, however, there was the fatal defect that because of its construction it was not possible to perform wide-width traversing.

This defect has a serious effect in designing the Winder.

Namely, when a yarn or thread is to be reeled using a traversing roll, there is a certain proper value which the angle of the slot about the outer shell surface of the roll must have. For this reason, for increasing the traversing width it is necessary that the diameter of the traversing roll be accordingly increased.

That is to say, if the traversing angle of the yarn is set at a given value, then when the traversing width is doubled, the outer diameter of the traversing roll must of necessity become doubled.

The present invention has been devised for preventing the above defect, it being one in which the grooved traversing roll and the drum type traversing roll have been cleverly combined so that the yarn slot of the drum type traversing roll has been made to intersect.

In a drum type traversing roll comprising an outer cylindrical shell, an inner hub concentric therewith, a yarn guide slot provided in said outer shell, and spaced yarn supporting pins disposed at a given depth about the inner side of the outer shell, the gist of the present invention resides in a traverse roll having a single endless thread or yarn guide slot which intersects, means at the intersecting portion forelfeeting the crossing of a yarn from the slot through which it has been guided to the slot running in the same direction as that through which it has been guided but on the other side of the intersecting portion, the crossing being accomplished by the yarn passing along the lower part of the aforesaid intersecting portion of the slots, and means for effecting the crossing of the yarn which has been guided through a slot from the opposite side from that hereinabove mentioned to the slot running in the same direction as that through which it has been guided but on the other side of the intersecting portion, the crossing being accomplished by the yarn passing along the upper part of the aforesaid intersecting portion of the slots, and furthermore said single endless slot for guiding the yarn being provided in the outer shell in such a fashion that it runs from one end of the shell to the other end and the intersection thereof occurring on the surface of said outer shell.

Hence, the diameter required of the roll according to the present invention will suflice with one half that of a conventional roll of this type when using one intersecting point with a given value for the traverse angle of the yarn. Further, since the yarn is made to cross without fail over one of the slots at the intersecting portion of the slots to a slot which extends in the same direction, the reeling can be carried out perfectly without any interruption in between.

An embodiment of the present invention will be described below with reference to the accompanying drawings, in which:

' FIG. 1 is a side view illustrating the relationship between the yarn, the traversing roll and the cheese. FIG. 2 is a developed view of the yarn guide slot of the invention. FIG. 3 are figures illustrating the tension to which the yarn is subjected. FIGS. 4 and 5 are developed views,

on an enlarged scale, of the intersecting portion pof the slot and rotated 90 from the general view of FIG. 2. FIG. 6 is a sectional view as viewed from the direction of VI--VI of FIG. 5. FIG. 7 is a sectional view whereby FIG. 6 has been simplified for explaining the principle involved by which the yarn crosses the intersecting portion of the slots.

Referring to FIG. 1, yarn y from a yarn delivery point 11 enters the slot of outer shell 12 of the rotating traversing roll 10 at point m, then maintaining contact with point n of an inner shell 13 made up of pins 30 leaves the roll from point of the outer shell. Roll by contacting cheese 14 rotates it to wind up the yarn thereon.

Referring to FIG. 2, first of all a description of the be havior of a yarn will be described when there is no yarn guiding means at the intersecting portion of the yarn guide slots. When crossing over from yarn guide slot 22 to the next yarn guide slot 23, the yarn which has entered slot 22 by roll 10 turning in the arrow direction is first guided along the edge d-a and while being subjected to a tension towards the outside of the roll is wound up on the cheese. At this time, when the case is considered where the roll is rotating in the direction of the arrow and the point where the yarn leaves the roll, i.e., point 0, is positioned at 26 while point m where the yarn enters the roll is at a, yarn y is in a state wherein it is subjected to a considerable tension when being stretched between point 11 where it is being delivered and point 26. The relationship at point In between tensions T and T and directions in which the yarn is delivered and wound up, respectively, as shown in FIG. 3-A, is that in which the resultant force T tends normally to move towards the left side. Thus, because there is no wall at the yarn slot intersecting portion, what happens is that point m: which has passed point a enters yarn guide slot 25 instead of yarn guide slot 23.

Similarly, when the yarn passes from yarn guide slot 24 to yarn guide slot 25, the relationship between the aforesaid tensions T and T that the yarn is subjected to between the yarn delivery point 11 and point 27 is as shown in FIG. 3'B and thus as a result of the resultant force T thereof point m upon passing point e enters yarn guide slot 23. Hence, it becomes necessary to devise means by which the yarn will cross over from yarn guide slot 22 into slot 23 and likewise from slot 24 over the intersecting portion into slot 25.

FIGS, 4 to 7 illustrate means by which it is contemplated to solve the foregoing problem. This has been achieved first by ensuring that slot 23, which corresponds to an extension of slot 22 and to which the yarn is to cross at the intersecting portion over to, opens so as to be in alignment with the line connecting yarn delivery point 11 and point a on the edge ad of slot 22 at the intersecting portion, i.e., by disposing the line connecting points a and 11 in FIG. 2 so that said line is at the right side of b, and by providing a bracket 28 in the slot at point a. Bracket 28 is shaped as shown in FIGURES 6 and 7 and is fitted to the backside of outer shell 12, inside of the slot and facing the same. From its bent portion a pin J extends slantingly and downwardly to that side where the bracket is attached. Secondly, the solution lies in providing pins K, L and M in slot 24 on this side of point a in such a fashion as to cross the slot portion and slope downwardly from side g-c. Bracket 28 and pins K, L and M are secured to the backside of outer shell 12 by means of adhesives or attaching means 29 such as screws.

As in the prior art traversing roll, periodically spaced pins 30 are disposed inside the outer shell 12 of the traversing roll at a given depth to form an inner shell 13. The foregoing pins andthe bracket are made with ma terials whose surface has a low coefficient of friction.

As hereinabove mentioned, the line connecting point a and yarn delivery point 11 must cross slot 23, i.e., point 17 must be 0. 6 S Qf slot 25 from point a and point c 4 must be on the side of slot 23. The yarn which has been conducted along the edge d-a of slot 22, upon arriving at point a, is received into the deepest part S of bracket 28. The yarn which has been received into deepest part S and moreover is being subjected to a tension in the direction of delivery point 11 is perforce made to cross slot .23. Thus, as the roll rotates, the yarn is received into slot 23. The yarn, after being conducted along b-e, is reversed and is then conducted through slot 24 along g-c. Since sloping pin K is disposed at or before point 0 (see FIG. 7), the yarn which approaches point c slides downwardly along the surface of pin K as far as pin 30 and becomes positioned at y where the line connecting position y and yarn delivery point 11 is on the side of slot 25 from point b.

Hence, since the line connecting this point y and the delivery point 11 is at a point forward of point b on the slot 25 side with respect to point 12, the yarn is received into slot 25 with the rotation of the roll and is conducted along b-f. At this time, as pin J is disposed alongside pin K, there is no possibility of the yarn being pushed beyond position y to the backside of outer shell 12 to become caught on backside u of bracket 28 and that a result be rendered such as it cannot leave the slot. The yarn, by being guided by pin I, again comes out of the slot to become wound up on the bobbin.

' Pins L and M are provided along the direction in which the yarn is to be guided, on this side of pin K, and are for gradually guiding the yarn to the far side of the slot. While these pins are not necessarily required, their provision is desirable in order to ensure the smooth guidance of the yarn.

Further, the method of attaching the pins to the outer shell and the configuration of the supplementary parts .of the pins can be modified suitably to meet the needs for strength and high speed operations. When there still remains unevenness in the package obtained, this is rectified by suitably modifying, the slot configuration in such a manner that the locus of 0 at the point of exit becomes a straight line. Further, the present invention is applicable in those instances in which there are two or more of the slot intersections.

Inasmuch as the present invention is practiced as fully described hereinbefore, the diameter of the drum type traversing roll becomes, with respect to a given traversing length, about one half that of the prior art apparatus, with the consequence that the volume of the winder itself becomes small and the weight also is reduced. 7

It will be understood that it is intended to cover all changes and modifications of the embodiment herein chosen for the purpose of illustration which do not constitute departures from the spirit and scope of the invention.

We claim:

1. A traversing roll having a cylindrical outer shell and a cylindrical inner shell concentric therewith, said outer shell having a slot therein guiding yarn or thread in-one traversing direction parallel to the axis of the shells and then in the opposite traversing direction, said slot having two portions, one for each traversing direction which portions intersect at least once intermediate their ends, said roll having at each intersection of the portions of the slot at least one pin which extends slantingly across the slot from one edge toward the other edge and inwardly from the outer shell toward the inner shell and a bracket on the other edge of the intersection of the slot portions for guiding the yarn so that it continues to traverse in the same direction across each intersection.

2. A traversing roll as claimed in claim 1 in which said bracket is disposed in the part of the slot adjacent the surface of the outer shell and is opposite the point on the intersection of the slot portions at which said pin is positioned.

3. A traversing roll as claimed in claim 1 in which said bracket has a further pin extending downwardly from the 5 bottom thereof and parallel to and spaced from said first mentioned pin.

4. A traversing roll as claimed in claim 1 in which the bracket is U-shaped and the position of the deepest part of the bracket is forward, in the traversing direction, of that point formed in the outer shell by the intersection of the slot portions which is moving toward the yarn being traversed, whereby the said point moves behind the yarn being traversed and guides it into the portion of said slot subsequent to said intersection for traversing the 10 yarn in such traversing direction.

References Cited UNITED STATES PATENTS 2,753,126 7/ 195 6 Marcellus 24243.2 2,801,808 8/1957 Gilbert 24243.2 3,022,021 2/1962 Zollinger 24243.2

FOREIGN PATENTS Add. 50,368 1/1962 France.

STANLEY N. GILREATH, Primary Examiner. 

1. A TRAVERSING ROLL HAVING A CYLINDRICAL OUTER SHELL AND A CYLINDRICAL INNER SHELL CONCENTRIC THEREWITH, SAID OUTER SHELL HAVING A SLOT THEREIN GUIDING YARN OR THREAD IN ONE TRAVERSING DIRECTION PARALLEL TO THE AXIS OF THE SHELLS AND THEN IN THE OPPOSITE TRAVERSING DIRECTION, SAID SLOT HAVING TWO PORTIONS, ONE FOR EACH TRAVERSING DIRECTION WHICH PORTIONS INTERSECT AT LEAST ONCE INTERMEDIATE THEIR ENDS, SAID ROLL HAVING AT EACH INTERSECTION OF THE PORTIONS OF THE SLOT AT LEAST ONE PIN WHICH EXTENDS SLANTINGLY ACROSS THE SLOT FROM ONE EDGE TOWARD THE OTHER EDGE AND INWARDLY FROM THE OUTER SHELL TOWARD THE INNER SHELL AND A BRACKET ON THE OTHER EDGE OF THE INTERSECTION OF THE SLOT PORTIONS FOR GUIDING THE YARN SO THAT IT CONTINUES TO TRAVERSE IN THE SAME DIRECTION ACROSS EACH INTERSECTION. 